Rival Libyan militia groups have fought a gun battle in the capital, Tripoli, officials say.
Exchanges of fire were heard and plumes of smoke seen coming from a district known as Tariq Al Shat in central Tripoli, eyewitnesses said.
An interior ministry official told Reuters news agency the fighting was between militiamen from the city of Misrata, and a group from Zintan.
The two militia groups fought together to overthrow Muammar Gaddafi last year.
Several militias from outside the capital have set up bases in Tripoli and regularly clash as they fight for control of parts of the city.